ML18025A586

Modification to Question 5.37 - Listing Pp&L'S 2 Exceptions to Regulatory Guide 1.18

ML18025A586
Person / Time
Site:	Susquehanna
Issue date:	03/23/1976
From:	Curtis N Pennsylvania Power & Light Co
To:	Butler W Office of Nuclear Reactor Regulation
References
Download: ML18025A586 (5)

Text

I NRC FORM 195 U.S. NUCLEAR REGULATORV COMMISSION DOCKET NUMBER

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". DESCRIPTION ENCLOSURE Ltr furnishing info concerning modificatiot to question 5.37 which will he includ'ed with material .submitted in Amdt t)16 to the PSAR.'...

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Director of Nuclear Reactor Regulation 1II Light Water Reactors Branch No. 1-2 U. S. Nuclear Regulatory Commission Washington, DC 20555 Attention: Dr. Walter R. Butler, Chief cket Nos. 50-387 50-388 SUSQUEHANNA STEAM ELECTRIC STATION MODIFICATION TO QUESTION 5.37 ER 100450 FILE 840-2 44 PLA-110 S

Dear Dr. Butler:

are in the process of writing our Stru ity Test Procedure to be cS'e Zg submitted. to you in late April, 1976. In Amen ent 15116, we submitted an amended response to Question 5.37 on compliance with Regulatory Guide 1.18. This response listed our exceptions to Regulatory Guide 1.18. We have two additional exceptions.

They are as follows:

l.

Reference:

Paragraph C.2 of the Regulatory Guide. We intend to select the number and distribution of measuring. points for monitoring radial deflections so that the as-built conditions can be considered in the assessment of general shell response.

In general the locations of measuring points for radial deflections are in agreement with Figure B, except point 1. Point 1 is provided at a distance of two times the wall thickness (12') from the base slab: This variation is made to properly predict the containment behavior near the base slab to wall connection. If point 1 were t'obe provided at a height of three times the wall thickness (18') it would be located very close to point 2 (suppression chamber wall midheight is 26') and would not yield any additional behavior pattern of the containment.

2.-

Reference:

Paragraph C.5 of the Regulatory Guide. Because of the current state of the art, triaxiel concrete strain distortion measurements, while taken, may not be used to evaluate the containment strain distribu-tion. The concrete strain will be evaluated using linear strain measurements in the meridional and radial directions.

3112 PENNSYLVANIA POWER IL LIGHT COMPANY

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Page 2 March 23, 1976 As we stated before, we intend, to "submit our Structural Integrity Test Procedure in late April and. would. like your comments on these exceptions prior to that d.ate ~

'44 N. W. Curtis

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Vice President-Engineering 5 Construction NWC:AAW